Journal of magnetic resonance imaging : JMRI
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J Magn Reson Imaging · Feb 2006
Comparative StudyCardiac CINE MR imaging with a 32-channel cardiac coil and parallel imaging: impact of acceleration factors on image quality and volumetric accuracy.
To assess the impact of parallel imaging algorithms on image quality and volumetric accuracy of CINE magnetic resonance imaging (MRI) with high temporal and spatial resolution using a new 32-channel dedicated cardiac phased array coil. ⋯ This study shows that one-dimensional acceleration factors up to R = 4 allow accurate SSFP CINE MRI even though CNR is significantly reduced. This allows for a marked reduction in scan time and allows for multi-slice CINE imaging with high spatial and temporal resolution.
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J Magn Reson Imaging · Feb 2006
Comparative StudyA parallel approach to STAP implementation for fMRI data.
To exploit the capabilities of parallel processing in applying the space-time adaptive processing (STAP) algorithm, previously explored on a small scale for functional magnetic resonance imaging (fMRI) applications, to conventional size fMRI data sets. ⋯ STAP is feasible on traditional size fMRI data sets and useful in elucidating spatial and temporal connectivity.
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J Magn Reson Imaging · Feb 2006
Comparative StudyProton magnetic resonance spectroscopic imaging to differentiate between nonneoplastic lesions and brain tumors in children.
To investigate whether in vivo proton magnetic resonance spectroscopic imaging (MRSI) can differentiate between 1) tumors and nonneoplastic brain lesions, and 2) high- and low-grade tumors in children. ⋯ Proton MRSI may have a promising role in differentiating pediatric brain lesions, and an important diagnostic value, particularly for inoperable or inaccessible lesions.
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J Magn Reson Imaging · Feb 2006
Comparative StudyR2 relaxometry with MRI for the quantification of tissue iron overload in beta-thalassemic patients.
To evaluate the usefulness of a time-efficient MRI method for the quantitative determination of tissue iron in the liver and heart of beta-thalassemic patients using spin-spin relaxation rate, R2, measurements. ⋯ Tissue iron deposition in beta-thalassemic patients may be adequately quantified using R2 measurements obtained with a 16-echo MRI sequence with short ES (5 msec), even in patients with a relatively increased iron burden.
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J Magn Reson Imaging · Feb 2006
Diffusion-weighted imaging of normal and malignant prostate tissue at 3.0T.
To measure the apparent diffusion coefficient (ADC) of normal and malignant prostate tissue at 3.0T using a phased-array coil and parallel imaging, and determine the utility of ADC values in differentiating tumor from normal peripheral zone (PZ). ⋯ DWI of the prostate at 3.0T in conjunction with a phased-array coil and parallel imaging allows ADC calculation of the prostate. ADC values were lower for tumors compared to normal-appearing PZ; however, there was considerable intersubject variability.